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Understanding Anorexia, Bulimia, and the Skinny on Fat - A Comprehensive Guide

Learn about the similarities, differences, and treatment of anorexia, bulimia, and obesity. Understand the complexities of eating disorders and the impact on mental and physical health. Discover insights on body image disturbances, addiction, and more.

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Understanding Anorexia, Bulimia, and the Skinny on Fat - A Comprehensive Guide

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  1. Anorexia, Bulimia and the Skinny on FatJ. Randle Adair, D.O., Ph.D.Diplomate, American Board of Internal MedicineCertified, American Society of Addiction Medicine Attending, Adult Hospital Medicine Presbyterian Medical Center Albuquerque, NM

  2. Faculty DisclosureforJ. Randle Adair, D.O., Ph.D. Speaker’s Bureau: Sanofi-Aventis (Lovenox) BMI = 24

  3. Definition of Alcoholism/Addiction “Alcoholism is a primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. The disease is often progressive and fatal. It is characterized by continuous or periodic: Impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, most notably denial.” American Society of AddictionMedicine/NCADD (1992)

  4. Definition of Alcoholism/Addictioncontinued • Additional characteristics: • Tolerance (physical and behavioral) • Escalating usage • Withdrawal upon abstinence • Craving and obsession

  5. True or False Pre-Test • All eating disorders are addictions • Bulimia is the same as Anorexia • Obesity is an addiction • All eating disorders respond to therapy • All eating disorders respond to 12 Steps • All eating disorders belong in the same room

  6. Prevalence of Eating Disorders • lifetime prevalence estimates are: • 0.6% for anorexia nervosa • 1.0% for bulimia nervosa • 2.8% for binge-eating disorder • Risk is up to 3 times higher in women vs men • Median age of onset is 18 to 21 years. • Am Fam Physician. 2008;77:187-195, 196-197.

  7. from Mihic & Harris, 1997 The Architecture: The Synapse

  8. Neural Reward Circuits Important in the Reinforcing Effects of Drugs of Abuse Camí, J. et al. N Engl J Med 2003;349:975-986

  9. From: Johnson & Ait-Daoud, 1999 The Adolescent Alcoholic Male problem: 5HT transporter

  10. Anorexia & Bulimia:Similarities & Differences to the Adolescent Male Alcoholic • Similarities: • Inherited, Sex specific • High mortality • Differences: • Prodromal psychiatric components • Begin in adolescence, trigger at puberty • Not related to chemical exposure • Avoidance rather than consumption • Residual psychiatric components

  11. Anorexia & Bulimia:Similarities & Differences to Each Other • Similarities • Inheritable patterns • Both have food component • Shared other behavioral/psychiatric components • Serotonin system • Differences • Abstinence patterns • Within Serotonin system

  12. Differences between Anorexia and Bulimiain 5HT1A receptor binding • A: Frontal Cortex B: Dorsal Raphe • Bailer et al., 2005 Arch. Gen. Psychiatry, 62: 1032-1041

  13. Anxious, obsessional, and perfectionistic in childhood Inexplicable fear of weight gain Unrelenting obsession with fatness Paradoxical harm avoidance High anxiety Anxious, obsessional, and perfectionistic in childhood Usually emerges after a period of dieting, which may not have been associated with weight loss Impulsivity and behavioral dyscontrol Prodromal ComponentsAnorexiaBulimia

  14. Normal vs Recovered Bulimia-type Anorexia Nervosa  Representational comparison of PET 5-HT radioligand findings in a woman recovered from BAN and a CW.Kaye et al.,2005 Physiology & Behavior, 85: 73-81

  15. Binding to 5HT1A receptorsNormal vs Recovered Bulimia-type Anorexia Nervosa • A: Normal Control Female B: Recovered Bulimia-type Anorexia Nervosa • Bailer et al., 2005 Arch. Gen. Psychiatry, 62: 1032-1041

  16. Shared Residual Components • Perfectionism • Inflexible thinking • Restraint in emotional expression • Social introversion • Body image disturbances • Obsessions related to symmetry, exactness and order

  17. The “Larger” Problem • Prevalence of adult obesity (BMI >30) has increased from 23% to 31% • Prevalence of adult overweight (BMI >25) is 66% • 33% of children today are overweight • BMI predicts higher mortality

  18. Body Mass Index

  19. Multivariate Relative Risks of Death in Relation to BMI among Men Adams K et al. N Engl J Med 2006;355:763-778

  20. Multivariate Relative Risks of Death in Relation to BMI among Women Adams K et al. N Engl J Med 2006;355:763-778

  21. It’s NOT about the puppy!

  22. Interactions among Hormonal and Neural Pathways That Regulate Food Intake and Body-Fat Mass Korner J and Leibel R. N Engl J Med 2003;349:926-928

  23. Neural Reward Circuits Important in the Reinforcing Effects of Drugs of Abuse Camí, J. et al. N Engl J Med 2003;349:975-986

  24. Metabotropic Mechanisms of Action of Drugs of Abuse Camí, J. et al. N Engl J Med 2003;349:975-986

  25. Is there a “magic bullet”?

  26. Effect of Placebo or Rimonabant for 52 Weeks on Body Weight, Waist Circumference, Plasma Triglyceride Levels, and High-Density Lipoprotein (HDL) Cholesterol Levels Despres J et al. N Engl J Med 2005;353:2121-2134

  27. Now you understand……….. The “munchies”

  28. Is Obesity Contagious? Ask 38,611 residents of Framingham, Massachusetts, related to 5,124 people who were the focus of study!

  29. Largest Connected Subcomponent of the Social Network in the Framingham Heart Study in the Year 2000 Christakis N and Fowler J. N Engl J Med 2007;357:370-379

  30. -A person's chances of becoming obese increased by 57% if he or she had a friend who became obese in a given interval.- Among pairs of adult siblings, if one sibling became obese, the chance that the other would become obese increased by 40%-If one spouse became obese, the likelihood that the other spouse would become obese increased by 37%. -These effects were not seen among neighbors in the immediate geographic location. -Persons of the same sex had relatively greater influence on each other than those of the opposite sex. -The spread of smoking cessation did not account for the spread of obesity in the network Lessons from Framingham

  31. Probability That an Ego Will Become Obese According to the Type of Relationship with an Alter Who May Become Obese in Several Subgroups of the Social Network of the Framingham Heart Study Christakis N and Fowler J. N Engl J Med 2007;357:370-379

  32. True or False Post-Test • All eating disorders are addictions False: Anorexia and Bulimia are profound disruptions of the serotonin system • Bulimia is the same as Anorexia False: Anorexia is reduced 5HT2A receptor activity, possibly increased 5HT transporter activity Bulimia is increased 5HT1A receptor activity • Obesity is an addiction True: Meets addiction criteria for exposure, tolerance, withdrawal, craving and is mediated by the same neurophysiological system that mediates alcohol addiction and tolerance

  33. True or False Post-Test • All eating disorders respond to therapy True: both counseling and pharmacotherapy, anorexia less so • All eating disorders respond to 12 Steps True: proven history • All eating disorders belong in the same room Probably not, given residual issues

  34. Thank you!!!

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